As of July 2026, dental impression materials remain one of the most clinically important supply decisions for practices across Toronto, Mississauga, Markham, and the Greater Toronto Area. Despite the rise of intraoral scanners, conventional impression techniques account for the majority of indirect restorations, prosthetics, and orthodontic models in Canadian dental offices. The material you choose directly affects marginal accuracy, patient comfort, and the number of retakes your team has to manage.
Understanding the Three Main Impression Material Categories
Dental impression materials fall into three primary categories, each with different chemistry, handling properties, and clinical applications. Understanding these differences helps you stock the right materials for your specific case mix.
Vinyl Polysiloxane (VPS) — The Versatile Workhorse
VPS (addition silicone) is the most widely used elastomeric impression material in Canadian dental practices. Its popularity stems from a combination of dimensional accuracy, ease of handling, and long-term stability.
Key characteristics of VPS impression materials:
- Dimensional stability: VPS maintains accuracy for weeks after setting, allowing flexibility in lab turnaround without compromising fit.
- Hydrophobic nature: Standard VPS materials are inherently hydrophobic, which means moisture control during impression-taking is critical. Newer surfactant-modified formulations improve wettability, but a dry field remains essential for accurate results.
- Multiple viscosities: Available in putty, heavy body, regular body, and light body — allowing dual-viscosity (putty-wash) or single-viscosity techniques depending on clinical preference.
- Setting time: Fast-set formulations offer working times as short as 1.5 minutes with total set times under 3 minutes, reducing chair time significantly.
The 3M Express VPS Light Body is a reliable choice for wash impressions in crown-and-bridge work. Its thixotropic consistency flows into sulcular detail without running off the preparation. For the putty component, the Express Putty VPS Impression Material (305mL Base + Catalyst) provides a rigid tray matrix that supports the light body for accurate detail capture.
For practices that prefer a cartridge-based system, the 3M Imprint 3 VPS Impression Material offers auto-mixing delivery that reduces air incorporation and improves consistency between impressions.
Pro Tip: When using VPS putty-wash technique, wait until the putty has reached initial set (firm but not rubbery) before loading the light body and reseating. Reseating too early compresses the putty before it can act as a rigid carrier, resulting in rebound distortion.
Polyether — Superior Moisture Tolerance
Polyether impression materials occupy a distinct niche in restorative dentistry. Their intrinsic hydrophilicity makes them particularly valuable in clinical situations where absolute moisture control is difficult to achieve.
Key characteristics of polyether:
- Hydrophilic: Polyether is inherently attracted to moisture, which means it captures detail even in the presence of minor saliva contamination or sulcular fluid.
- Stiffness: Set polyether is significantly stiffer than VPS, which provides excellent dimensional stability but can make removal from undercuts challenging — especially with fixed partial denture (bridge) impressions.
- Dimensional stability: Excellent short-term accuracy, but polyether absorbs moisture from the environment over time, so impressions should be poured or sent to the lab promptly.
The 3M Impregum F Polyether Impression Material remains the reference standard for polyether materials. For high-volume practices, the 3M Impregum Penta Polyether offers the same material in a pentamix delivery system for automated mixing and consistent results across your team.
Don't forget the adhesive — polyether requires its own specific tray adhesive for reliable bonding to the impression tray. The 3M Polyether Tray Adhesive (17mL) is formulated specifically for polyether chemistry and should be applied at least 5 minutes before loading the impression material.
Alginate — The Fast, Affordable Study Model Material
Alginate (irreversible hydrocolloid) remains the go-to material for study models, orthodontic records, bleaching tray fabrication, and preliminary impressions. Its low cost and fast setting time make it the most frequently used impression material by volume in most Canadian dental practices.
Key characteristics of alginate:
- Lowest cost per impression: Alginate costs a fraction of VPS or polyether materials, making it practical for routine study models and non-precision applications.
- Rapid setting: Most alginates set within 2–3 minutes, minimizing patient discomfort — particularly important for patients with strong gag reflexes.
- Limited dimensional stability: Alginate impressions must be poured within 10–15 minutes of removal because the material begins to lose and gain water rapidly, distorting the impression.
- Not suitable for precision work: Alginate lacks the detail reproduction and dimensional stability required for crown, bridge, or implant impressions.
Bite Registration Materials
Accurate bite registration is just as critical as the impression itself. An impression that captures perfect marginal detail is clinically useless if the occlusal relationship is off.
VPS bite registration materials are the standard for most indirect restorations. The Dentsply Regisil VPS Bite Registration Material (4×50mL) offers rigidity and snap-set properties that minimize patient-induced distortion during the bite-taking process. For practices looking for a cost-effective alternative, the PERFIT Bite Registration A-Silicone (50mL × 2 Cartridges) delivers reliable results at a lower price point.
Dedicated Bite Registration Trays (50/pk) ensure consistent material placement and a clean, reproducible bite record that your lab can trust.
Impression Trays: Choosing the Right Carrier
The impression tray is often an afterthought, but tray selection directly affects impression quality. Key considerations:
- Stock trays vs. custom trays: Stock metal trays work for most single-unit crown impressions. Custom trays fabricated from acrylic provide uniform material thickness, which is critical for polyether impressions and full-arch work.
- Autoclavable plastic trays: The Autoclavable Plastic Steel Impression Trays (10/pk) offer a cost-effective, infection-control-compliant option for practices that go through high volumes of impressions.
Pro Tip: Always try in the impression tray before mixing material. A tray that is too tight will compress the material against soft tissue, while a tray that is too loose wastes material and reduces accuracy. The ideal tray provides 3–5 mm of uniform space between the tray wall and the prepared tooth.
Retraction and Hemostasis: The Impression Pre-Work
No impression material — regardless of how advanced its chemistry — can capture marginal detail through blood and sulcular fluid. Gingival retraction and hemostasis are prerequisites for any precision impression.
Ultrapak Knitted Dental Retraction Cord is a Canadian practice staple for mechanical retraction. The knitted design provides consistent, predictable expansion and is available in multiple sizes to match sulcus depth. For chemical hemostasis, ViscoStat 20% Gel (30mL Indispense Syringe) delivers ferric sulfate directly to the sulcus for rapid bleeding control without the tissue damage associated with some aluminum chloride preparations.
The 3M Astringent Retraction Paste Capsules (25/Pk) offer a convenient capsule-based alternative that combines retraction and hemostasis in a single step — reducing chair time and simplifying your workflow.
Dispensing Equipment
Cartridge-based impression materials require a dispensing gun for controlled delivery. The Dispensing Gun for Impression (1:1 Ratio) works with standard 50mL cartridge systems used by most VPS and polyether materials on the market.
Digital vs. Conventional: Where Do Impressions Stand in 2026?
Intraoral scanners continue to gain market share in Canadian dental practices, particularly for single-unit restorations and orthodontic planning. However, conventional impression materials remain the standard for full-arch implant cases, complex fixed partial dentures, and practices that have not yet made the capital investment in digital scanning technology.
Many Ontario practices operate a hybrid workflow — using digital scans for straightforward cases and conventional impressions for complex rehabilitations. This approach maximizes the benefits of both technologies while managing equipment costs.
Pro Tip: If your lab supports both digital and conventional workflows, evaluate your case mix before committing fully to either technology. Practices placing fewer than 3–4 crowns per week may find that conventional impression materials deliver a lower per-unit cost than the amortized expense of a scanning system.
Stocking Your Impression Supply Chain
Running out of impression material mid-procedure is a scheduling disaster. A well-stocked impression station for a typical Canadian restorative practice should include:
- VPS light body (minimum 2 cartridge packs on hand)
- VPS putty or heavy body (1–2 tubs)
- Bite registration material (1 pack)
- Retraction cord (2–3 sizes)
- Hemostatic agent
- Appropriate tray adhesive
- Stock impression trays in a range of sizes
- Mixing tips (stock generously — these are single-use)
Shop the full Impression Materials and Retraction & Hemostatic collections at EBIKO Dental. Orders over $99 CAD ship free across the GTA, $199 CAD across Ontario, and $299 CAD across Canada.
Frequently Asked Questions
Q: What is the best dental impression material for crown and bridge work in Canada?
VPS (vinyl polysiloxane) is the most widely used impression material for crown and bridge work in Canadian dental practices. It offers excellent dimensional accuracy, long shelf stability, and is available in multiple viscosities for putty-wash techniques. Polyether is preferred when moisture control is challenging. Both materials are available through Canadian dental suppliers like EBIKO Dental with free shipping across the GTA on orders over $99 CAD.
Q: How long can you wait to pour a dental impression?
VPS impressions can be stored for days or even weeks without clinically significant distortion, giving you flexibility with lab scheduling. Polyether impressions should be poured or shipped within a few hours because they absorb environmental moisture. Alginate impressions must be poured within 10–15 minutes — delays cause irreversible dimensional changes.
Q: Do Canadian dentists still use conventional impressions or has everyone switched to digital scanners?
As of July 2026, the majority of Canadian dental practices still use conventional impression materials for at least some of their restorative work. While intraoral scanner adoption is increasing, particularly in urban centres like Toronto and the GTA, conventional VPS and polyether impressions remain the standard for complex cases, full-arch work, and practices that haven't invested in scanning technology. Many offices run a hybrid workflow.